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Finding the Fourth Proportional to 212,893,947.66, 319,394,858.30 and 65,348,987.91

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Solution

The fourth proportional to 212,893,947.66, 319,394,858.30 and 65,348,987.91 is: 98,040,038.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,893,947.66 : 319,394,858.30 = 65,348,987.91 : x
  2. Step 2: Convert to fraction form
    212,893,947.66/319,394,858.30 = 65,348,987.91/x
  3. Step 3: Cross multiply
    212,893,947.66x = 319,394,858.30 × 65,348,987.91
  4. Step 4: Simplify right side
    212,893,947.66x = 20,872,130,733,236,120
  5. Step 5: Solve for x
    x = 20,872,130,733,236,120/212,893,947.66
  6. Step 6: Final answer
    x = 98,040,038.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.